[Zope] Hooking into traversal

I want to write an object that can be traversed by ZPublisher. The goal is so I can write URLs like thingyForwarder/45/display, to get an object corresponding to thingy #45, and call its display() method. What's the Zope Zen way of doing this? Implement an __of__ method for acquisition? Implement a __bobo_traverse__ method? Make thingyForwarder a Folderish object and implement all the folder methods? -- A.M. Kuchling http://starship.python.net/crew/amk/ "Wet", said he. Classics was his subject, and he sometimes affected a classical simplicity in social conversation. -- Robertson Davies, _Tempest-Tost_